Failure rate statistics and spectrum analysis of heating network components based on an investigation

Based on the investigation and statistics of operation and failure situations of heating networks in Beijing, Shenyang, Harbin and Mudanjiang, provides diameter-based failure rate data of pipelines, valves and corrugated expansion joints of these cities. Analyses failure occurrence regularity of heating networks in Beijing and Shenyang through pipe-diameter spectrum, yearly spectrum and monthly spectrum, and finds that the failure rate is the highest for the heating networks of moderate pipe diameter(DN250～DN400) and that the failure rate increasing with operating years in Beijing is lower than that of Shenyang. Failure rate data of heating network components of Beijing and Shenyang could be taken as a reference for reliability research of heating networks in China.